Due to the sheer variety of climbing opportunities in Tirol, a jury of experts chose five sport climbing routes throughout the state and dubbed them the Great Lines. Passionate climbers in search of particularly beautiful challenges with difficulty levels 6 and 7 will have their hands full ascending the Great Lines. With thousands of routes, selecting the very best was no easy task. Nevertheless, a jury of experts led by Barbara Bacher, Barbara Zangerl, Kilian Fischhuber, Markus Schwaiger, Martina Harnisch and Michael Meisl narrowed down their final selection from the best of the best. Experts selected the climbing routes based on the nature and landscapes, the route, the rock conditions and the physical and mental demands on climbers.
In the end, the "Number One Direkt" climbing route at Schleier Waterfall in the Wilder Kaiser region was selected. It is considered one of the most difficult of all sport climbing routes in Tirol.